package com.java.common.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.authentication.logout.LogoutFilter;
import org.springframework.web.filter.CorsFilter;

import com.java.common.boot.filter.JwtAuthenticationTokenFilter;
import com.java.common.boot.filter.handle.AuthenticationEntryPointImpl;
import com.java.common.boot.filter.handle.LogoutSuccessHandlerImpl;
import com.java.common.constant.SecurityConstants;

/**
 * spring security配置
 * 
 * @author Administrator
 */
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    /**
     * 自定义用户认证逻辑
     */
    @Autowired
    private UserDetailsService userDetailsService;

    /**
     * 认证失败处理类
     */
    @Autowired
    private AuthenticationEntryPointImpl unauthorizedHandler;

    /**
     * 退出处理类
     */
    @Autowired
    private LogoutSuccessHandlerImpl logoutSuccessHandler;

    /**
     * token认证过滤器
     */
    @Autowired
    private JwtAuthenticationTokenFilter authenticationTokenFilter;

    /**
     * 跨域过滤器
     */
    @Autowired
    private CorsFilter corsFilter;

    /**
     * 解决 无法直接注入 AuthenticationManager
     *
     * @return
     * @throws Exception
     */
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    /**
     * anyRequest | 匹配所有请求路径<br>
     * access | SpringEl表达式结果为true时可以访问<br>
     * anonymous | 匿名可以访问<br>
     * denyAll | 用户不能访问<br>
     * fullyAuthenticated | 用户完全认证可以访问（非remember-me下自动登录）<br>
     * hasAnyAuthority | 如果有参数，参数表示权限，则其中任何一个权限可以访问<br>
     * hasAnyRole | 如果有参数，参数表示角色，则其中任何一个角色可以访问<br>
     * hasAuthority | 如果有参数，参数表示权限，则其权限可以访问<br>
     * hasIpAddress | 如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问<br>
     * hasRole | 如果有参数，参数表示角色，则其角色可以访问<br>
     * permitAll | 用户可以任意访问<br>
     * rememberMe | 允许通过remember-me登录的用户访问<br>
     * authenticated | 用户登录后可访问<br>
     */
    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity
                // CSRF禁用，因为不使用session
                .csrf().disable()
                // 认证失败处理类
                .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
                // 基于token，所以不需要session
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                // 过滤请求
                .authorizeRequests().antMatchers(SecurityConstants.ANONYMOUS_ANY_ANT_PATTERNS).anonymous()
                .antMatchers(HttpMethod.GET, SecurityConstants.ANONYMOUS_GET_ANT_PATTERNS).permitAll()
                // 除上面外的所有请求全部需要鉴权认证
                .anyRequest().authenticated().and().headers().frameOptions().disable();
        httpSecurity.logout().logoutUrl(SecurityConstants.LOGOUT_URL).logoutSuccessHandler(logoutSuccessHandler);
        // 添加JWT filter
        httpSecurity.addFilterBefore(authenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
        // 添加CORS filter
        httpSecurity.addFilterBefore(corsFilter, JwtAuthenticationTokenFilter.class);
        httpSecurity.addFilterBefore(corsFilter, LogoutFilter.class);
    }

    /**
     * 强散列哈希加密实现
     */
    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public DaoAuthenticationProvider authenticationProvider() {
        DaoAuthenticationProvider provider = new DaoAuthenticationProvider();
        provider.setUserDetailsService(userDetailsService);
        provider.setPasswordEncoder(bCryptPasswordEncoder());
        provider.setHideUserNotFoundExceptions(false);
        return provider;
    }

}